package com.litianhao.nowcode.controller;

import com.google.code.kaptcha.Producer;
import com.litianhao.nowcode.entity.User;
import com.litianhao.nowcode.service.UserService;
import com.litianhao.nowcode.util.CommunityConstant;
import com.litianhao.nowcode.util.CommunityUtil;
import com.litianhao.nowcode.util.RedisKeyUtil;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @author litianhao
 * @create 2020-05-18 14:09
 */
@Controller
public class LoginController implements CommunityConstant {

    private static final Logger logger = LoggerFactory.getLogger(LoginController.class);

    @Autowired
    private UserService userService;

    @Autowired
    private Producer kaptchaProducer;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @Autowired
    private RedisTemplate redisTemplate;

    //注册页面
    @RequestMapping(path = "/register",method = RequestMethod.GET)
    public String getRegisterPage(){
        return "/site/register";
    }

    @RequestMapping(path = "/login",method = RequestMethod.GET)
    public String getLoginPage(){
        return "/site/login";
    }

    @RequestMapping(path = "/register",method = RequestMethod.POST)
    public String register(Model model, User user){
        Map<String, Object> map = userService.register(user);
        if(map==null || map.isEmpty()){
            //注册成功

            model.addAttribute("msg","注册成功了，我们已经向您的邮箱发送激活邮件");
            model.addAttribute("target","/index");
            return "/site/operate-result";
        }else{
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            model.addAttribute("emailMsg",map.get("emailMsg"));
            return "/site/register";
        }
    }

    @RequestMapping(path = "/activation/{userId}/{code}",method = RequestMethod.GET)
    public String activation(Model model, @PathVariable("userId") int userId,@PathVariable("code") String code){
        int result = userService.activation(userId, code);
        if(result==ACTIVATION_SUCCESS){
            model.addAttribute("msg","激活成功了，您的帐号已经可以正常使用了");
            model.addAttribute("target","/login");
        }else if(result==ACTIVATION_REPEAT){
            model.addAttribute("msg","无效的操作，该帐号已经被激活过了");
            model.addAttribute("target","/index");
        }else{
            model.addAttribute("msg","激活失败了，您的激活码不正确");
            model.addAttribute("target","/index");
        }

        return "/site/operate-result";
    }

    @RequestMapping(path = "/kaptcha",method = RequestMethod.GET)
    public void getKaptcha(HttpServletResponse response/*, HttpSession session*/){
        //生成验证码
        String text = kaptchaProducer.createText();
        BufferedImage image = kaptchaProducer.createImage(text);

        //将验证码存入session
        //session.setAttribute("kaptcha",text);

        //将验证码存到redis中
        //验证码的归属
        String kaptchaOwner = CommunityUtil.generateUUID();
        Cookie cookie = new Cookie("kaptchaOwner",kaptchaOwner);
        cookie.setMaxAge(60);
        cookie.setPath(contextPath);
        response.addCookie(cookie);
        //将验证码存入redis
        String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
        redisTemplate.opsForValue().set(redisKey,text,60, TimeUnit.SECONDS);

        //将图片输出给浏览器
        response.setContentType("image/png");
        try {
            ServletOutputStream os = response.getOutputStream();
            ImageIO.write(image,"png",os);
        } catch (IOException e) {
            logger.error("响应验证码失败"+e.getMessage());
        }
    }

    @RequestMapping(path = "/login",method = RequestMethod.POST)
    public String login(String username,String password,String code,boolean rememberme,
                        Model model,/*HttpSession session,*/HttpServletResponse response,
                        @CookieValue("kaptchaOwner") String kaptchaOwner){
        //首先判断验证码
        //String kaptcha = (String)session.getAttribute("kaptcha");
        String kaptcha = null;
        if(StringUtils.isNotBlank(kaptchaOwner)){
            String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
            kaptcha = (String) redisTemplate.opsForValue().get(redisKey);
        }
        if(StringUtils.isBlank(kaptcha) || StringUtils.isBlank(code) || !kaptcha.equalsIgnoreCase(code)){
            model.addAttribute("codeMsg","验证码不正确");
            return "/site/login";
        }
        //检查帐号和密码
        int expiredSeconds = rememberme ? REMEMBER_EXPIRED_SECONDS : DEFAULT_EXPIRED_SECONDS;
        Map<String, Object> map = userService.login(username, password, expiredSeconds);
        if(map.containsKey("ticket")){
            //成功了
            Cookie cookie = new Cookie("ticket",map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);

            return "redirect:/index";
        }else{
            //失败了  回到登录界面
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            return "/site/login";
        }
    }

    @RequestMapping(path = "/logout",method = RequestMethod.GET)
    public String logout(@CookieValue("ticket") String ticket){
        userService.logout(ticket);
        SecurityContextHolder.clearContext();
        return "redirect:/login";
    }

}
